<!-- ignore the following lines, they are not important to this demo -->
<jigsaw-demo-description [summary]="summary" [content]="description">
</jigsaw-demo-description>


<!-- start to learn the demo from here -->
<jigsaw-input #input [valid]="input.value.length > 2"
              placeholder="输入至少3个字符">
</jigsaw-input>




